Generating a Lognormal distribution for a stock

Hi,


I have a stock in which I want to create a lognormal distribution for. Specfically my boss has given me the current price $162.34, and the current volatility (16.2%). What I need to find out is what are the prices of the stock going to be when the current vol increases by 25% 50% 100% and 200%, and what the prices will be when vol decreases by the same critera but lognormally fitted. Really looking for some help, and believe a lognormal distribution should do it, but I forget how to do that.

This may help...
http://www.youtube.com/watch?v=9rMpraPPQ2A