Military often provides a form of qualification test for people to enter special career fields. Suppose that a large number of people have taken a test for a certain career field. Suppose that the mean of all people taking this test is 250 points, with a standard deviation of 50 points. Assume that the scores of those previously taking the test were normally distributed. For this career field, only those people scoring in the top 20% are eligible for admission to career field training. What is the score that must be achieved to reach at least the top 20%.