Find and replace special characters

[rvproductions2000]

I have a file that I need to perform a search and replace. The values are as below

x96 should be a dash (“-”)
x92 should be an apostrophe (" ’ ")

There are a couple of more. When I perform a Ctrl+H, the below character displays in the Find textbox.

�

I am unable to perform a search and replace.

Any ideas?