In redhat, the root directory is usually something like /var/www or one of its subdirs (don't remember and no redhat9 in my possession to test).
Meanwhile, you can change that root dir in your configuration file /etc/httpd/conf/httpd.conf file. Look at the documentRoot directive. If you change the document root, you will have to modify as well all <Directory /your/dir> entries related to your docRoot.
To take changes into account, restart apache.