I am a little confused on what to do about the 3/4.

1. At a tennis tournament a statistician keeps track of every serve. The statistician reported that the mean serve speed of a particular player was 101 miles per hour (mph) and the standard deviation of the serve speeds was 14 mph. Assuming the shape of the distribution is approximately normal, give an interval that will contain the speeds of at least three-fourths of the player's serves. Hint: what is 4 in terms of percentage? eviation