Change Apache root directory

I am having problems changing the Permissions on the "username.conf" file in the /etc/apache2/users/ folder. It needs to have the permission of

-rw-r--r-- 1 root wheel 298 Jun 28 16:47 username.conf

but I am not able to achieve this.

I have tried changing the permissions with the command

sudo chmod 644 username.conf;

and it didn't change.

I am using this tutorial: http://ift.tt/1HgFdxM

When I check the permission of the file, it's

-rw-r--r-- 1 root wheel 155 Jan 23 23:30 Owner.conf

When I navigate to http://localhost/~Owner/ , I get 404 Not found.