It looks like you’ve removed the tagline under Settings > General. If you’d prefer to add it back but not display it on the site, this custom CSS should do the trick:
.site-description {
display: none;
}
To move it lower, you could add this instead, adjusting the number as you like:
Thanks for your help. I already did this, but there’s still white little circle in the middle of picture. How can I remove this ‘sign’? I upload header again but it’s still there.