Hello,

for the second is quite simple. Add this to theme options -> styling options -> custom css

#page-nav {

    margin-top: 60px;

}

and just assign different (lower) value to 60px

for the second you may need to have media queries for different screen resolutions

open style.css

and look for 

#pre-hero {
   padding: ___px ___ ___px;
}

and decrease the first value

Thanks