Remove existing pad which has sunk. Install new pad with a 6" step where the new pad meets the existing walk. Remainder of the pad can be and should be 4". There will be a couple tons of gravel needed to achieve desired height. Step from existing walk up 6" to new pad then step up from new pad up 6" into the house. Not worried about damage to shrubs between walk and new slab. Ready to hire immediately.
Present condition of project area: