What can i add to this post discussion?

A z-score shows how far a data point is from the mean, measured in standard deviations.

A positive z-score shows that the data point is above the mean. For example, a z-score of +2 means the data point is two standard deviations above the mean. A negative z-score shows the data point is below the mean. So, a z-score of -2 would mean the data point is two standard deviations below the mean.