There are many programs that allow you to crop photos. A TIFF is a type of raster image file (aka photo).
I recommend Microsoft Picture Manager. That program came with the version of Office that I have on this computer.
It will be much more difficult but you could also use the MS Paint program that comes as a part of Windows.
You could also use the Snagit Editor. (Snagit is an awesome tool from www.techsmith.com
If none of these options are what you have in mind, send the tiff to me and let me know how much to trim from each side and I will do it for you. If I know how much I am trimming from an image it takes less than 30 seconds to open and trim the file.