Still having difficulty solving for u and s
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
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