One hundred students took a statistics exam where the mean score was 78. The distribution was normal. The standard deviation was 4. If Chris earned an 80 on the exam, at approximately what percentile did his grade fall? (Round your answer to the nearest whole number.)

Answer 1

You will find this most useful for these type of questions
http://davidmlane.com/normal.html

enter 78 and 4 for the mean and sd
click on below and enter 80

you should get .6915
so appr the 69 percentile