what percent of Peruvian rams weigh more than 89kg?

Question

the distribution of the weighs of Peruvian rams is approximately normal with mean of 75kg and standard deviation 7kg

Answer 1

Obtain a z-score chart

http://users.stat.ufl.edu/~athienit/Tables/Ztable.pdf

 

z = (89 - 75) / 7

z = 14 / 7

z = 2

 

For 2 standard deviations above the mean, 97.72% are below.

So what percentage are above?