Varies. There's no one size fits all in medicine , but as a general rule blood pressures with systolic (top) of less than 130 and bottom less than 80 ( diastolic) is considered acceptable. Some recommend 110 over70 as ideal.
Less than 120/80. Blood pressure above 120/80 is considered prehypertension and associated with increased risk. It is treated with exercise low sodium heart healthy diet and weight loss. There is no lower limit for systolic BP (top number) as long as no symptoms are occurring but there is evidence that diastolic BP below 60 may be associated with worse outcomes.