You can upload your website files using cPanel's File Manager.

Steps:

1. Log in to cPanel.
2. Open File Manager.
3. Go to the public_html directory.
4. Click Upload.
5. Select your website files.
6. If your website is uploaded as a ZIP file, select it and click Extract.
7. Make sure your main index.html or index.php file is inside public_html.
8. Visit your domain to verify that your website is working.