The default web root directory of Apache Web Server is in "/var/www/html".
However, if you want to change it to different folder, then edit the value DocumentRoot in config files.
1. Find the config files:
[root@localhost ~]# locate httpd.conf
2. Open the ~/httpd.conf, look for value DocumentRoot and change as you want, like this
DocumentRoot "/home/xjaphx/public_html"
Have fun!@