Normal Curve & Standard deviation HELP!

This is my homework question and in my right brained mind can not or the life of me think any further. My only hope is that someone out there in the universe can help my melted brain:
Pick a continuous variable (that is, interval or ratio in scale of measurement) that is normally distributed. Explain the distribution of the variable. What do scores in the center of the distribution mean for this particular variable? What about scores in the tails?

If you have a z score of +2.58, what does that mean in terms of your specific variable?