Can someone help with the problem in the picture

Place the following steps in order to complete the square and solve the quadratic equation,

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.