Hi Fro,
The space available will determine when words start wrapping onto 2 lines. If the sub menu type is a mega menu, you can increase the width of the column that the link is within. If the sub menu type is a flyout menu, you can increase the width of the flyout menu in the theme editor.
For the second question, it is your theme that determines the position of the menu, so if there is no theme option to change the position of the menu, you’d need some custom CSS to change its position. If you could post a link to your site I would be happy to advise.