A set of exam scores is normally distributed with a mean = 80 and standard deviation = 5. Use the Empirical Rule to answer the following questions. 95% of the data values lie between |70 and 90 50 % of the exam scores are less than or equal to 80. 2.51 of the exam scores are less than or equal to 75. Enter an integer or decimal number [more. .] *% of the exam scores are less than or equal to 90. *% of the exam scores are less than or equal to 85