Step 1 - Simply, please create with this format:
folder: name => your_custom_font_name in folder => create file: your_custom_font_name.css and all files fonts (ttf, eot, woff, ...)
in file: your_custom_font_name.css => call link to fonts file:
This is ex about fonts of us get at here
Step 2 - Navigate to Appearance→Theme Options→Fonts > Set Type font to "Custom Font"
Documentation guide on how to configure your text font