The request was re-mapping to /var/www/html/info.php rather than /home/user/public_html/something
To change a domain's document root, you'd need to edit the file in /var/cpanel/userdata/username/domain.com location where username is the cPanel username and domain.com is the domain name. In that file, there will be a documentroot line. Simply change the path.
If this isn't what you mean, please specify precisely whether this isn't a domain but the hostname or something else (if it's the hostname, you'd change /var/cpanel/userdata/nobody/hostname.domain.com documentroot location).
After changing the documentroot path in the file, you'd need to rebuild Apache and restart it (after making a backup):
Code:
cp /etc/httpd/conf/httpd.conf /etc/httpd/conf/httpd.conf.bak100709
/scripts/rebuildhttpdconf
/etc/init.d/httpd restart