By Marina Lopes WASHINGTON (Reuters) – International Business Machines Corp reported higher than expected quarterly revenue and earnings per share, as it continued its shift to higher-end businesses such as big data, cloud computing, and security and mobile services. Total revenue fell 2 percent to $24.4 billion in the second quarter, above analysts average estimate of $24.1 billion. The worlds largest technology services companys net profit rose to $4.1 billion, or $4.12 per share, from $3.2 billion, or $2.91 per share, a year earlier. On an adjusted basis, the company earned $4. …