Hey Rob636.

You still need to decide what the variance is (to have a specific normal distribution).

Once you do that, then you can calculate the probabilities of "bins" (example: one bin might be $4 - $5) and then use that to describe what the probability of getting certain prices.

To obtain probabilities, you should use a calculator or computer program which should be available after a quick google search. You can also use R which is a free package and use the pnorm command to get probabilities.