widen width of page?

here is my website http://iwebsbuilder.com/home/services/
I’m using the Dzonia Lite theme. I am VERY new to wordpress and even more new to coding, i would like to change that page so it fits the entire width instead of having a horizontal scroll bar. This is an external page embedded into wordpress. I would need step by step instructions since i have no idea what to do! Thanks in advance

[duplicate – please continue with http://wordpress.org/support/topic/change-width-of-template?replies=8 ]