Exam grades: scores on a statistics final in a large class were normally distributed with a mean of 75 and a standard deviation of 9. Part D: Between what two values are the middle 60% of the scores?...

Exam grades: scores on a statistics final in a large class were normally distributed with a mean of 75 and a standard deviation of 9.

Part D: Between what two values are the middle 60% of the scores?

*Need help with figuring out how to find the two values you plug in for the area of invNorm to get the final answer on a TI-84.