You can use this css to move it up or down which is all I needed .
div#hubspot-messages-iframe-container {
bottom: 55px!important;
}
You can move it to the left using this
div#hubspot-messages-iframe-container {
bottom: 55px!important;
left:0px!important;
width:416px!important;
}
Doesn’t look quite as good, it needs the initial width as it will get resized by a script when chat opened