statistics
posted by Randy on .
Find z such that 20.3% of the standard normal curve lies to the right of z.
0.831
0.533
0.533
0.257
0.257

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z score related to that proportion.
Would it help to know that Z = +1 is at the 84th percentile?