How many protons are in Nitrogen if it has a 7 above the symbol?

There shouldn't be anything *directly* above the chemical symbol.
And nitrogen always has 7 protons, or else it would be some other element.

I will use the following customary letters for the nuclear contents:
Z = number of protons
N = number of neutrons
A = Z + N = number of nucleons = atomic mass number
[ -- which is always an integer, unlike the atomic mass, which never is, except for carbon-12]

The four corners of a chemical symbol are used for:
upper left: A
lower left: Z
upper right: ionization state [one or more +'s, or one or more -'s]
lower right: number atoms of this element in a molecular formula

So if the 7 is in the upper left, it means 7 protons and no neutrons, which is impossible. Such a nucleus cannot even be assembled.

If it's in the upper right, there'd better be either a + or a - after it, and either way, that is a very extreme ionization state for nitrogen, requiring a very exotic circumstance for its very existence.

It sounds like it was probably a mistake. The usual, stable isotope of non-ionized nitrogen is
₁₄
₇N

If the 7 was in the top left corner of the N symbol we would say this is the Nitrogen 7 isotope i.e. 7 neutrons. If it is just above or below the N symbol then it is simply the Atomic number (# of protons). The stable isotope would also be 7 neutrons. However there can be more and this would be indicated in the top left of the number as a superscript.

Nitrogen isotopes will only be important to you (assuming you are in college) when you study NMR spec data or Mass Spectroscopy.