Answer:
B
Step-by-step explanation:
Converting it to z, we can use the formula of z-score:
z-score = [tex]\frac{x-\mu}{\sigma}[/tex]
Where
x is the value we are checking for (here, x = 79)
[tex]\mu[/tex] is the mean, which is 85
[tex]\sigma[/tex] is the standard deviation, which is 4 now
Let's plug the information into the formula and solve for the answer:
[tex]\frac{x-\mu}{\sigma}\\\frac{79-85}{4}\\-\frac{6}{4}\\-1.5[/tex]
B is the correct answer.
