1. After post-graduate study, Jane found a job as HR analyst in London. The company is currently recruiting Chief Marketing Officer. The HR department recently sent out a knowledge test to the applicants after the initial CV screening. At this stage of selection, the company invites the highest 15% (the opposite is the lowest 85%.) scoring back for the next face-to-face interview. According to the historical data, the test scores on this test are normally distributed and has a mean of 85 with standard deviation of 5.

1. What mark (to the nearest whole number) must a candidate achieve in order to secure an interview? Show your workings.