.jtpl-header__inner {
    background: url(https://u.jimcdn.com/cms/o/s79820cbc39dc5d79/userlayout/img/pp1.jpg);
    background-position: left;
    background-position-x: left;
    background-position-y: center;
    background-repeat: no-repeat;
}

@media (min-width: 800px) {
    .jtpl-header__inner {
    background: url(https://u.jimcdn.com/cms/o/s79820cbc39dc5d79/userlayout/img/pp1.jpg);
    background-position: left;
    background-position-x: left;
    background-position-y: center;
    background-repeat: no-repeat;
    }
}

@media (max-width: 800px) {
    .jtpl-header__inner {
    background: url(https://u.jimcdn.com/cms/o/s79820cbc39dc5d79/userlayout/img/pp1-klein.jpg);
     background-position: left;
    background-position-x: left;
    background-position-y: center;
    background-repeat: no-repeat;
   }

}