In the beginning, the universe was a single point. But where was that point exactly? What was its location?
As explained in an article in the FYI section of PopSci.com, it was, and still is… everywhere.
In other words, no matter where you are in the universe, you’re at the centre! 
It’s answers like these that make my head explode.
I remember when Exhibit Two tried to help me grasp the concept that the universe has no centre. I developed a somewhat similar headache when trying to wrap my kosher samurai brain around the concept while reading the PopSci.com article.
“First, it’s important to know that the big bang wasn’t an explosion of matter into empty space—it was the rapid expansion of space itself. This means that every single point in the universe appears to be at the center. Think of the universe as an empty balloon with dots on it. Those dots represent clusters of galaxies. As the balloon inflates, every dot moves farther away from every other dot. The space between clusters of galaxies expands, like the rest of the universe, at an accelerating rate. (Gravity keeps the clusters themselves the same size.)”
Edwin Hubble first observed this phenomenon in 1929, when he noticed that the light from distant galaxies shifted to the red end of the spectrum, as though it had been stretched as it traveled through space. By measuring the wavelengths of the light, Hubble observed that galaxies were expanding away from each other at a rate proportional to their distance from one another.
In the beginning, the universe was a single point. Where was that? It was, and still is, everywhere. Scientists even have proof: Light from the big bang, in the form of cosmic radiation, fills the sky in every direction.
 I will have to modify my remarks to my then 14-year-old daughter, Exhibit One, that she was not the centre of the universe and that we now have the Hubble Space Telescope photos to prove it!