Here's the question and I am not sure where to start:-

The scores on a university exam are normally distributed with a mean of 62 and a standard deviation of 11. The bottom 5% of students will fail the course. What is the lowest mark that a student can get in order to pass.

How to I find z in the first place.....and then I assume that they are asking for X!

z=(x-mu)s

I am assuming that my mu is 62

S= 11

help!