A 38-year-old male patient presents to your clinic with a 2-week history of mid-back pain and stiffness. The patient reports that the pain started after lifting heavy boxes while helping a friend move. He experiences difficulty twisting his torso to the right and has noticed muscle tightness on the left side of his mid-back. Physical examination reveals tenderness over the left paraspinal muscles at the T5 vertebral level, restricted left rotation, and restricted left lateral flexion that improves with flexion. Based on these findings, you diagnose the patient with a specific thoracic somatic dysfunction. You decide to use the High-Velocity Low-Amplitude (HVLA) technique for treatment. Given the physical examination findings, which thoracic somatic dysfunction diagnosis is most likely, and which patient position is most appropriate for the HVLA treatment?