Computing z score in a normal distribution

Question

Q1: What is the z-score at 1 standard deviation away from the mean? Assume that the distribution is normal.

Answer 1

Since the distribution is assumed to be normal the formula for the Z score is simple (by deffinition)

Z = (x - μ)/σ. SO - if x is one sd from mean (i.e. x = μ-σ) and with σ = 1 this becomes simple algebra.

Z = ((μ-σ)-μ)/σ. or -1/1 OR Z = ((μ+σ)-μ)/σ. or 1/1

The answer is minus one (or one)

Does no one ever read the definitions anymore?