If you're allowed to use a calculator here, use it!
This is basic normal probability, with mean 143 and s. d. 15.7.
I typed in the following:
normal cdf(111.6, 174.4, 143, 15.7) and got the probability 0.954. In words, more than 95% of scores were between 111.6 and 174.4 on this test.
