How do i order UFC 84 if i have rogers as my cable provider?

You can tune into channel 345 before 10PM, and press "B" to buy. It should ask for a PIN, which would be "1111" or "0000" if you haven't set up your own. You can also call Rogers at 1-888-764-3771 to request this be ordered for you. This is assuming of course that you have a digital box. If you don't have one, I'm afraid that you would be out of luck.