Suppose the mean height for men is 70 inches with a standard deviation of 2 inches. What percentage of men are less than 74 inches tall?

Answer 1

Taking this question all of the way to its conclusion, you can see that the area to the left of a z value =2.o is .9772 or 97.2%.

Answer 2

Obtain a z-table

http://users.stat.ufl.edu/~athienit/Tables/Ztable.pdf

z = (X - μ) / σ

z = (74 - 70) / 2

z = 2

What percent is that on the chart?