having difficulty with question similiar to previous post

[klewis]

Still having difficulty solving for u and s

Question is

It is known that the IQ scores of workers in a certain company are normally distributed with a standard deviation of ten. If 0.13% of workers have IQs in excess of 130, calculate the mean IQ.

This is what I gather from question

s=10
p(x>130)=P(z>.13)

z value in chart for .13 is 1.13

z=x-u/s or -1.13=x-u/10

stuck at this point - I think I am having problem with rearranging formual to solve for u and s as example questions in course have only had me solve for x and z not u and s

[JohnM]

You actually need P(z > 0.0013), which is Z=3.011

You're given s = 10 and x = 130

z = (x - u)/s

3.011 = (130 - u) / 10

Solve for u.

[klewis]

thanks got this one,