Find the area of the shaded region.The graph to the right depicts IQ scores of Adults (85-120), and those scores are normally distributed with a mean of 100 and a standard deviation of 15

Answer 1

you can play around a lot with Z table stuff here:

http://davidmlane.com/hyperstat/z_table.html

Answer 2

Another method:

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between the two Z scores.