Maybe it's just me, but is there anything worse than a dart that totally misses the (bust) point? The optics are never flattering with a bust dart that is either too low or too high.
Pro tip? Always take into consideration the bra you'll wear under the garment you're about to sew.
Bras can shift our bust apex depending on how much padding and support if offers. Here's a little tutorial all about the bust apex. How to find it and how to move it.