@Shanan: It’s the size of your header image that pushed down the search in header. So, if you want to extend the header image to large then either you need to hide the header search by adding in the following css in “Appearance => Theme Options => Custom CSS” box.
#header .social-search {
display: none;
}
Or you can can reduce the size of the search in header. For example, with your current header image size, you need to adjust the size as following.
#header .social-search {
width: 206px;
}
#header .social-search form.searchform input {
width: 102px;
}