Step-by-step explanation:
We know that,

Where,
X = raw score = 84
μ = mean = 68
σ = standard deviation = 10
Putting the values,

The percent of his sales that were less than or equal to 84 inches, is

Therefore, the remaining 100-94.5=5.5% were more than 84 inches.
If you change the point's x-coordinate, the point will move either to the left or the right, depending on if the number you change is negative or positive.
The answer is 79 im sure of it