I need help with this. Thank you.

Suppose a normally distributed set of data has a mean of 115 and a standard deviation of 20. Use the 68-95-99.7 Rule to determine the percent of scores in the data set expected to be below a score of 155. Give your answer as a percent and include as many decimal places as the 68-95-99.7 rule dictates.

Answer = % (Enter your answer as a percent. Do not enter in decimal form or round your answer. For example, enter 93.8 for 93.8%, not 0.939)