Hello,
1. Please provide us with wp-admin panel and FTP credentials and give us the code you want to implement in the header.
2. You need edit that row in Visual Composer editor and change the settings, for example:
http://storage4.static.itmages.com/i/15/0518/h_1431945115_2199295_ba45758217.png
Regards,
Eva Kemp.