"The number of nails in a carton is $N(563.3, 33.2)$. The distributor guarantees that the number of nails is more than $n$ with a probability of 99%. Decide n."

I've tried to make this into the standardized normal distribution with $P(Z >\frac{n-563.3}{33.2}) = 0.99$ but I don't know where to take it from there, or if this even is a correct way to tackle this problem. Some hints and help would be greatly appreciated.