Church Child theme – adjust margins

Hi – this is probably a basic question, so apologies in advance. I am non-techie, but want to adjust the margins on my main body text to give more white space left and right. Is this what I am seeing under ‘Wrap’ below. Can anyone advise which of the px values I need to change? Thanks.

/***** Wrap ********************/

#wrap {
background: #ffffff;
width: 960px;
margin: 1px auto 10px;
position: relative;
border: 5px solid #30B1B6;
-moz-box-shadow: 0 1px 3px #000000;
-webkit-box-shadow: 0 1px 3px #000000;

-moz-border-radius: 8px;
border-radius: 8px;
-moz-box-shadow: 1px 1px 7px 1px #000000;
-webkit-box-shadow: 1px 1px 7px 1px #000000;
box-shadow: 1px 1px 7px 1px #000000;
}

/**border: -moz-linear-gradient(center top , #FFFFFF 0%, #92C7EC 100%) **/
——————–

I also want to adjust the header to show even white space all around, including under the second phone number. That should be my next q!
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