Try adding this to your style.css file –
.smw_left {
text-align: right !important;
}
Also, if you want the text right above it to float to the right, then add text-align: right;
around line 230 in your style.css file like this –
#header .widget-area {
float: right;
padding: 20px 0 0;
text-align: right;
width: 510px;
}