Hello, Welcome to HCM.
This position of placenta is commonest and safest, so be assured on this front.
Chances of a normal vaginal delivery
after a C section 8 years ago, the answer is YES. But the major deciding factor is whether there is any disproportion between size of pelvis and head of baby. Depending on cause of previous cesarean, you may aaccordingly discuss with your obstetrician.
There are some causes, which repeat themselves over subsequent pregnancy
... e.g premature rupture of membranes
The decision of NORMAL DELIVERY versus C-section is guided by many factors and is best left in the hands of clinician.
So act accordingly. All the best